gcc/cp/tinfo.h

   1 // RTTI support internals for -*- C++ -*-
   2 // Copyright (C) 1994, 1995, 1996 Free Software Foundation
   3
   4 #include "typeinfo"
   5
   6 // Class declarations shared between the typeinfo implementation files.
   7
   8 // type_info for a class with no base classes (or an enum).
   9
  10 struct __user_type_info : public type_info {
  11   __user_type_info (const char *n) : type_info (n) {}
  12
  13   // If our type can be converted to the desired type,
  14   // return the pointer, adjusted accordingly; else return 0.
  15   virtual void* dcast (const type_info &, int, void *,
  16                        const type_info * = 0, void * = 0) const;
  17 };
  18
  19 // type_info for a class with one public, nonvirtual base class.
  20
  21 class __si_type_info : public __user_type_info {
  22   const __user_type_info &base;
  23
  24 public:
  25   __si_type_info (const char *n, const __user_type_info &b)
  26     : __user_type_info (n), base (b) { }
  27
  28   virtual void *dcast (const type_info &, int, void *,
  29                        const type_info * = 0, void * = 0) const;
  30 };
  31
  32 // type_info for a general class.
  33
  34 typedef unsigned int USItype    __attribute__ ((mode (SI)));
  35
  36 struct __class_type_info : public __user_type_info {
  37   enum access { PUBLIC = 1, PROTECTED = 2, PRIVATE = 3 };
  38
  39   struct base_info {
  40     const __user_type_info *base;
  41     USItype offset: 29;
  42     bool is_virtual: 1;
  43     access access: 2;
  44   };
  45
  46   const base_info *base_list;
  47   size_t n_bases;
  48
  49   __class_type_info (const char *name, const base_info *bl, size_t bn)
  50     : __user_type_info (name), base_list (bl), n_bases (bn) {}
  51
  52   // This is a little complex.
  53   virtual void* dcast (const type_info &, int, void *,
  54                        const type_info * = 0, void * = 0) const;
  55 };